I went to advance auto parts to buy the fan, mine had the cracking around the base of the clutch. I bought the premium fan they had after looking at it compared to the stock fan. Frankly, the advance fan(cannot remember the name brand) was superior is quality, plus the blades had a better angle to the ends to suck in more air. The clutch was bad too so I purchased a premium unit from napa, as I have had two other Ford's with bad clutches and the napa units have always performed perfectly. The T-stat was replaced too along with the temp sender when I did all this, and these came from autozone, mainly because it was convienant. They had a choice between a 195 or 198 so I went with the 198. No real reason for this other than the engine might be a little more effecient with a slightly higher running temp, just thought I would try it out(I thought that I could always put a 195 back in if it presented a prob) and the needle stays right between the "O" and "R" in NORMAL. If I am idling the truck for 10 minutes or so with the A/C on the gauge will slowly creep up between the "R" and "M", as soon as I start driving the fan clutch is engaged for a bit and the gauge goes right back down. All the parts, which include the clutch, fan, temp sender, and thermostat ran about $110. Hope this helps.